Material preparation device of PVC wood-plastic board

Abstract

This invention discloses a material preparation device for PVC wood-plastic composite boards, relating to the field of PVC wood-plastic composite board production equipment. It includes a crushing cylinder, a second transition pipe fixedly connected to the lower end of the crushing cylinder, a grinding cylinder fixedly connected to the lower end of the second transition pipe, and a fifth fixed shaft rotatably connected to the middle of one end of the crushing cylinder. In this invention, when the third fixed shaft drives the crushing and filtering cylinder to rotate, it can flip the wood blocks inside the crushing and filtering cylinder, allowing uncut wood blocks to be cut again by the crushing blades. Simultaneously, when the two ends of the crushing and filtering cylinder coincide with the upper end of the crushing cylinder, small wood blocks enter the crushing and filtering cylinder from the first transition pipe. The third fixed shaft drives the crushing blades to rotate, cutting the wood blocks again, reducing their volume and facilitating the grinding of wood powder. The fifth fixed shaft driving the crushing and filtering cylinder to rotate makes it easier for the cut wood blocks to enter the crushing cylinder from the crushing and filtering cylinder.

Description

Technical Field

[0001] This invention relates to the field of PVC wood-plastic composite board production equipment, and more particularly to a material preparation device for PVC wood-plastic composite boards. Background Technology

[0002] Wood-plastic composite (WPC) is primarily a mixture of PVC resin and wood powder, with a significant portion of wood powder. It's a green and environmentally friendly new decorative material made from wood as the base material, possessing not only the characteristics of wood but also the properties of plastic. This material is waterproof and moisture-proof, effectively preventing rotting due to dampness during use. It offers a wide range of color options and also has sound-absorbing and insect-repellent properties. WPC has a fire rating of B1 and strong high-temperature resistance, making it suitable for outdoor decoration.

[0003] Existing wood powder production equipment operates on a simple principle, but generates a large amount of dust during the sanding process. If this dust is not properly protected, it can affect the working environment and harm workers' health. Furthermore, the process typically involves directly pulverizing the wood, which simplifies the workflow but takes a significant amount of time for each step, thus not improving work efficiency. In contrast, separating the workflow requires multiple workers to control multiple machines, increasing the number of workers needed and raising production costs. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a material preparation device for PVC wood-plastic composite boards.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a material preparation device for PVC wood-plastic composite board, comprising a crushing cylinder, a second transition pipe fixedly connected to the lower end of the crushing cylinder, a grinding cylinder fixedly connected to the lower end of the second transition pipe, a fifth fixed shaft rotatably connected to the middle of one end of the crushing cylinder, two sets of pulleys fixedly connected to one end of the fifth fixed shaft, a crushing and filtering cylinder fixedly connected to the end of the fifth fixed shaft away from the pulleys, a third fixed shaft rotatably connected to the middle of the crushing and filtering cylinder, a crushing blade cylinder fixedly connected to the middle of the third fixed shaft, one end of the third fixed shaft passing through the crushing and filtering cylinder and the crushing cylinder and fixedly connected to the two sets of pulleys, and the third fixed shaft rotatably connected to the middle of the crushing cylinder and the crushing and filtering cylinder, the surface of the crushing and filtering cylinder being provided with through holes, and the upper and lower ends of the crushing and filtering cylinder fitting against the inner surface of the crushing cylinder.

[0006] As a further description of the above technical solution:

[0007] A second transition pipe is fixedly connected to the lower end of the pulverizing cylinder, and a filter plate is provided at the connection between the pulverizing cylinder and the second transition pipe. The diameter of the through hole in the filter plate is the same as the diameter of the through holes on both sides of the pulverizing filter cylinder. A grinding cylinder is fixedly connected to the lower end of the second transition pipe, and the pulverizing cylinder, the grinding cylinder, and the second transition pipe are internally connected. A sixth fixed shaft is rotatably connected to one end of the grinding cylinder. A pulley is fixedly connected to the middle of the sixth fixed shaft. A pulverizing and grinding cylinder is fixedly connected to the end of the sixth fixed shaft away from the pulley. The pulverizing and grinding cylinder is rotatably connected inside the grinding cylinder. Both sides are fixedly connected with filter baffles. The filter baffles and both ends of the grinding cylinder are tightly attached to the inner surface of the grinding cylinder. The middle of the two sets of filter baffles is provided with through holes. Both sides of the grinding cylinder are provided with through holes. The diameter of the through holes on both sides of the filter baffles and the grinding cylinder is the same. The diameter of the through holes is smaller than that of the through holes on both sides of the grinding cylinder. Both ends of the grinding cylinder are provided with through holes. The diameter of the through holes is equal to that of the through holes on both sides of the grinding cylinder. A filter plate is provided at the lower end of the grinding cylinder. The diameter of the through holes on the filter plate is the same as that of the through holes on the side of the grinding cylinder.

[0008] As a further description of the above technical solution:

[0009] A sealing turntable is rotatably connected to the end of the crushing and grinding cylinder away from the sixth fixed shaft. Two sets of fourth fixed shafts are rotatably connected to the middle of the sealing turntable. One end of each set of fourth fixed shafts passes through the sealing turntable and is rotatably connected inside the crushing and grinding cylinder. A grinding roller is fixedly connected to one end of each set of fourth fixed shafts. The end of each fourth fixed shaft away from the grinding roller is rotatably connected to one end of the grinding cylinder, and the end of the fourth fixed shaft away from the grinding roller passes through the grinding cylinder. A fourth gear is fixedly connected to the end of each set of fourth fixed shafts passing through the grinding cylinder, and the two sets of fourth gears mesh with each other. A pulley is fixedly connected to the end of one set of fourth fixed shafts passing through the grinding cylinder.

[0010] As a further description of the above technical solution:

[0011] The upper end of the crushing cylinder is fixedly connected to a first transition tube, the upper end of the first transition tube is fixedly connected to a cutting box, the upper end of the cutting box is fixedly connected to a limit channel, the upper ends of the cutting box are rotatably connected to a first fixed shaft, both ends of the two sets of first fixed shafts pass through the cutting box, the middle of the two sets of first fixed shafts is fixedly connected to a first cutting roller, one end of the two sets of first fixed shafts is fixedly connected to a first gear, and the two sets of first gears mesh with each other, and the other end of the two sets of first fixed shafts is fixedly connected to a pulley.

[0012] As a further description of the above technical solution:

[0013] The lower ends of the cutting box are rotatably connected to two second fixed shafts. Both ends of the two sets of second fixed shafts pass through the cutting box. A second cutting roller is fixedly connected to the middle of the two sets of second fixed shafts. A second gear is fixedly connected to one end of the two sets of second fixed shafts, and the two sets of second gears mesh with each other. A pulley is fixedly connected to the other end of the two sets of second fixed shafts. Two sets of first fixed shafts are fixedly connected to the second fixed shaft directly below through pulleys and belts. One set of first fixed shafts is connected to a third fixed shaft through pulleys and belts. The third fixed shaft is connected to a fourth fixed shaft through pulleys and belts.

[0014] As a further description of the above technical solution:

[0015] The cutting box, crushing cylinder and grinding cylinder are all fixedly connected to the outside of the fixed frame. A fixed base is fixedly connected to one side of the fixed frame. A motor is fixedly connected to the middle of one end of the fixed base. The output end of the motor is fixedly connected to one end of the sixth fixed shaft.

[0016] As a further description of the above technical solution:

[0017] The crushing and filtering cylinder is connected to the cutting box through its upper and lower ends, and the crushing and grinding cylinders are all connected to the second transition pipe through their upper and lower ends.

[0018] As a further description of the above technical solution:

[0019] Limiting blocks are fixedly connected to both ends of the pulverizing filter cylinder and the pulverizing and grinding cylinder, and the limiting blocks are slidably connected inside the pulverizing cylinder and the grinding cylinder, respectively.

[0020] The present invention has the following beneficial effects:

[0021] In this invention, the motor first drives the device simultaneously via pulleys, a first gear, a second gear, a fourth gear, and a belt. The first and second cutting rollers cut the wood into small pieces. When the third fixed shaft drives the crushing and filtering cylinder to rotate, it flips the wood pieces inside the crushing and filtering cylinder, allowing uncut pieces to be cut again by the crushing roller. Simultaneously, when the two ends of the crushing and filtering cylinder coincide with the upper end of the crushing cylinder, the small wood pieces enter the crushing and filtering cylinder from the first transition tube. The third fixed shaft drives the crushing roller to rotate, cutting the wood pieces again, reducing their size and facilitating the grinding of wood powder. The fifth fixed shaft drives the crushing and filtering cylinder to rotate, making it easier for the cut wood pieces to enter the crushing cylinder from the crushing and filtering cylinder.

[0022] The cut wood blocks fall into the grinding cylinder through the through-holes on the side of the grinding and filtering cylinder. The filter baffle prevents uncut wood blocks from entering the grinding cylinder. The two sets of fourth fixed shafts rotate in opposite directions, allowing the grinding rollers to grind the small wood blocks into wood powder. The sixth fixed shaft drives the grinding and crushing cylinder and the filter baffle to rotate, turning over the un-grinded wood blocks, thus grinding all the wood blocks that have entered the grinding and crushing cylinder. The rotation of the grinding and crushing cylinder by the sixth fixed shaft makes it easier for the wood powder to enter between the filter baffle and the grinding and crushing cylinder. The wood powder falls into the grinding and crushing cylinder between the filter baffle and the grinding and crushing cylinder through the side of the grinding and crushing cylinder. After the grinding and crushing cylinder drives the middle of the filter baffle to rotate until it coincides with the lower end of the grinding cylinder, the wood powder will leave the device from the lower end of the grinding cylinder, thus obtaining wood powder.

[0023] The cutting and sanding of wood are all carried out inside the cutting box, limiting channel, crushing cylinder and grinding cylinder, which prevents dust from spreading in the work space, ensures a good working environment and protects the health of workers. Attached Figure Description

[0024] Figure 1 This is a first-time perspective view of the present invention;

[0025] Figure 2 This is a second time-perspective view of the present invention;

[0026] Figure 3 This is a three-dimensional cross-sectional view of the cutting box of the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the first and second cutting rollers of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the pulverizing cylinder and grinding cylinder of the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the pulverizing filter cylinder and the pulverizing and grinding cylinder of the present invention.

[0030] Legend:

[0031] 1. Fixed frame; 2. Cutting box; 3. Limiting channel; 4. Crushing cylinder; 5. Grinding cylinder; 6. First transition pipe; 7. Fixed seat; 8. Motor; 9. Pulley; 10. First fixed shaft; 11. Second fixed shaft; 12. First gear; 13. Second transition pipe; 14. Second gear; 15. Third fixed shaft; 16. Fourth fixed shaft; 17. First cutter roller; 18. Second cutter roller; 19. Fourth gear; 20. Crushing and filtering cylinder; 21. Crushing and grinding cylinder; 22. Limiting block; 23. Sealing turntable; 24. Crushing blade cylinder; 25. Grinding roller; 26. Fifth fixed shaft; 27. Sixth fixed shaft; 28. Filter baffle. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Reference Figure 1-6An embodiment of the present invention provides a material preparation device for PVC wood-plastic composite boards, comprising a crushing cylinder 4, a second transition pipe 13 fixedly connected to the lower end of the crushing cylinder 4, a grinding cylinder 5 fixedly connected to the lower end of the second transition pipe 13, a fifth fixed shaft 26 rotatably connected to the middle of one end of the crushing cylinder 4, two sets of pulleys 9 fixedly connected to one end of the fifth fixed shaft 26, a crushing and filtering cylinder 20 fixedly connected to the end of the fifth fixed shaft 26 away from the pulleys 9, a third fixed shaft 15 rotatably connected to the middle of the crushing and filtering cylinder 20, a crushing blade cylinder 24 fixedly connected to the middle of the third fixed shaft 15, one end of the third fixed shaft 15 passing through the crushing and filtering cylinder 20 and the crushing cylinder 4 and fixedly connected to the two sets of pulleys 9, and the third fixed shaft 15 rotatably connected to the crushing cylinder 4. The crushing and filtering cylinder 20 has through holes on its surface. The upper and lower ends of the crushing and filtering cylinder 20 are attached to the inner surface of the crushing cylinder 4. Whole pieces of wood are placed inside the limiting channel 3. The motor 8 drives the device to continue working via pulley 9, first gear 12, second gear 14, fourth gear 19, and belt drive. The wood is cut into small pieces by the first cutting roller 17 and second cutting roller 18. The fifth fixed shaft 26 drives the crushing and filtering cylinder 20 to rotate. When the upper end of the crushing and filtering cylinder 20 overlaps with the upper end of the crushing cylinder 4, the cut wood pieces enter the crushing and filtering cylinder 20. When the third fixed shaft 15 drives the crushing and filtering cylinder 20 to rotate, it can flip the wood pieces inside the crushing and filtering cylinder 20, allowing uncut pieces to be removed. The wood blocks can be cut again by the crushing blade cylinder 24. Simultaneously, when the two ends of the crushing filter cylinder 20 align with the upper end of the crushing cylinder 4, small pieces of wood enter the crushing filter cylinder 20 through the first transition pipe 6. The third fixed shaft 15 drives the crushing blade cylinder 24 to rotate, cutting the wood blocks again and reducing their size for easier grinding into wood powder. The fifth fixed shaft 26 drives the crushing filter cylinder 20 to rotate, aligning its two ends with the lower end of the crushing cylinder 4. This allows the cut wood blocks to more easily enter the crushing cylinder 4 from the crushing filter cylinder 20. The cut wood blocks fall into the crushing cylinder 4 through the through-holes on the side of the crushing filter cylinder 20. The filter baffle 28 prevents uncut wood blocks from entering the crushing cylinder 4. The two sets of fourth fixed shafts 16 rotate in opposite directions, enabling the grinding roller 25 to grind small wood blocks into wood powder. The sixth fixed shaft 27 drives the crushing and grinding cylinder 21 and the filter baffle 28 to rotate, turning over the un-grinded wood blocks, thus grinding all the wood blocks that have entered the crushing and grinding cylinder 21. The sixth fixed shaft 27 drives the crushing and grinding cylinder 21 to rotate, making it easier for the wood powder to enter between the filter baffle 28 and the crushing and grinding cylinder 21. The wood powder passes through the side of the crushing and grinding cylinder 21 and falls between the filter baffle 28 and the crushing and grinding cylinder 21. After the crushing and grinding cylinder 21 drives the middle of the filter baffle 28 to coincide with the lower end of the grinding cylinder 5, the wood powder will leave the device from the lower end of the grinding cylinder 5, thus obtaining wood powder.

[0034] Limiting blocks 22 are fixedly connected to both ends of the crushing and filtering cylinder 20 and the crushing and grinding cylinder 21. The limiting blocks 22 are slidably connected inside the crushing cylinder 4 and the grinding cylinder 5, respectively. The crushing and filtering cylinder 20 is connected to the cutting box 2 through its upper and lower ends. The crushing and grinding cylinder 21 is connected to the second transition pipe 13 through its upper and lower ends. The cutting box 2, the crushing cylinder 4 and the grinding cylinder 5 are all fixedly connected to the outside of the fixing frame 1. The fixing frame 1 is fixedly connected to one side of the fixing seat 7. The middle of one end of the fixing seat 7 is fixedly connected to the motor 8. The output end of the motor 8 is fixedly connected to one end of the sixth fixing shaft 27. The lower end of the cutting box 2 is rotatably connected to the two sides of the second fixing shaft 11. The two ends of the two sets of second fixing shafts 11 pass through the cutting box 2. The middle of the two sets of second fixing shafts 11 is fixedly connected to the second cutting roller. 18. Two sets of second fixed shafts 11 are each fixedly connected to a second gear 14 at one end, and the two sets of second gears 14 mesh with each other. Two sets of pulleys 9 are fixedly connected to the other end of each set of second fixed shafts 11, and two sets of pulleys 9 are fixedly connected to the other end of each set of second fixed shafts 11. Two sets of first fixed shafts 10 are connected to the second fixed shaft 11 directly below through pulleys 9 and belts. One set of first fixed shafts 10 is connected to a third fixed shaft 15 through pulleys 9 and belts. The third fixed shaft 15 is connected to a fourth fixed shaft 16 through pulleys 9 and belts. A first transition pipe 6 is fixedly connected to the upper end of the crushing cylinder 4. A cutting box 2 is fixedly connected to the upper end of the first transition pipe 6. A limit channel 3 is fixedly connected to the upper end of the cutting box 2. Both sides of the upper end of the cutting box 2 are rotatably connected. There is a first fixed shaft 10. Both ends of the two sets of first fixed shafts 10 pass through the cutting box 2. The middle of the two sets of first fixed shafts 10 is fixedly connected to a first cutter roller 17. One end of the two sets of first fixed shafts 10 is fixedly connected to a first gear 12, and the two sets of first gears 12 mesh with each other. The other end of the two sets of first fixed shafts 10 is fixedly connected to a pulley 9. The lower end of the crushing cylinder 4 is fixedly connected to a second transition pipe 13. A filter plate is provided at the connection between the crushing cylinder 4 and the second transition pipe 13. The diameter of the through hole of the filter plate is the same as the diameter of the through holes on both sides of the crushing filter cylinder 20. The lower end of the second transition pipe 13 is fixedly connected to a grinding cylinder 5. The crushing cylinder 4, the grinding cylinder 5 and the second transition pipe 13 are internally connected. One end of the grinding cylinder 5 is rotatably connected to a sixth fixed shaft 27. A pulley 9 is fixedly connected to the middle of the fixed shaft 27. A grinding cylinder 21 is fixedly connected to the end of the sixth fixed shaft 27 away from the pulley 9. The grinding cylinder 21 is rotatably connected inside the grinding cylinder 5. Filter baffles 28 are fixedly connected to both sides of the grinding cylinder 21. The filter baffles 28 and both ends of the grinding cylinder 21 are tightly fitted to the inner surface of the grinding cylinder 5. A through hole is provided in the middle of the two sets of filter baffles 28. Through holes are provided on both sides of the grinding cylinder 21. The diameter of the through holes on both sides of the filter baffles 28 and the grinding cylinder 21 is the same, and the diameter between these through holes is smaller than the diameter of the through holes on both sides of the grinding filter cylinder 20. Through holes are provided at both ends of the grinding cylinder 21, and the diameter of these through holes is equal to the diameter of the through holes on both sides of the grinding filter cylinder 20. A filter plate is provided at the lower end of the grinding cylinder 5.The diameter of the filter plate's through-hole is the same as the diameter of the through-hole on the side of the grinding and polishing cylinder 21. A sealing turntable 23 is rotatably connected to the end of the grinding and polishing cylinder 21 away from the sixth fixed shaft 27. Two sets of fourth fixed shafts 16 are rotatably connected to the middle of the sealing turntable 23. One end of each set of fourth fixed shafts 16 passes through the sealing turntable 23 and is rotatably connected inside the grinding and polishing cylinder 21. A grinding roller 25 is fixedly connected to one end of each set of fourth fixed shafts 16. The end of the fourth fixed shaft 16 away from the grinding roller 25 is rotatably connected to one end of the grinding cylinder 5, and this end passes through the grinding cylinder 5. A fourth gear 19 is fixedly connected to the end of each set of fourth fixed shafts 16 passing through the grinding cylinder 5, and the two sets of fourth gears 19 mesh with each other. A pulley 9 is fixedly connected to the end of one set of fourth fixed shafts 16 passing through the grinding cylinder 5.

[0035] Working principle: When processing wood flour, whole pieces of wood are placed inside the limiting channel 3. The motor 8 drives the device to continue working through the pulley 9, the first gear 12, the second gear 14, the fourth gear 19, and the belt. The wood is cut into small pieces of wood by the first cutting roller 17 and the second cutting roller 18. The fifth fixed shaft 26 drives the crushing and filtering cylinder 20 to rotate. When the upper end of the crushing and filtering cylinder 20 coincides with the upper end of the crushing cylinder 4, the cut wood pieces enter the crushing and filtering cylinder 20. The third fixed shaft 15 drives the crushing and filtering cylinder 2... When the cylinder rotates, it can flip the wood blocks inside the crushing and filtering cylinder 20, allowing any uncut wood blocks to be cut again by the crushing blade cylinder 24. Simultaneously, when both ends of the crushing and filtering cylinder 20 align with the upper end of the crushing cylinder 4, small wood blocks enter the crushing and filtering cylinder 20 through the first transition pipe 6. The third fixed shaft 15 drives the crushing blade cylinder 24 to rotate, cutting the wood blocks again and reducing their size for easier grinding into wood powder. The fifth fixed shaft 26 drives the crushing and filtering cylinder 20 to rotate, thus... The two ends of the filter cylinder 20 coincide with the lower end of the crushing cylinder 4, allowing the cut wood blocks to more easily enter the crushing cylinder 4 from the filter cylinder 20. The cut wood blocks fall into the crushing cylinder 4 through the through holes on the side of the filter cylinder 20. The filter baffle 28 prevents uncut wood blocks from entering the crushing cylinder 4. The two sets of fourth fixed shafts 16 rotate in opposite directions, allowing the grinding roller 25 to grind the small wood blocks into wood powder. The sixth fixed shaft 27 drives the crushing and grinding cylinder 21 and the filter baffle 28 to rotate. The unpolished wood blocks are flipped over, so that all the wood blocks inside the crushing and polishing cylinder 21 are polished. The sixth fixed shaft 27 drives the crushing and polishing cylinder 21 to rotate, which makes it easier for wood powder to enter between the filter baffle 28 and the crushing and polishing cylinder 21. The wood powder passes through the side of the crushing and polishing cylinder 21 and falls between the filter baffle 28 and the crushing and polishing cylinder 21. After the crushing and polishing cylinder 21 drives the middle of the filter baffle 28 to coincide with the lower end of the grinding cylinder 5, the wood powder will leave the device from the lower end of the grinding cylinder 5, thus obtaining wood powder.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material preparation device for PVC wood-plastic composite board, comprising a crushing cylinder (4), characterized in that: The lower end of the crushing cylinder (4) is fixedly connected to a second transition pipe (13), and the lower end of the second transition pipe (13) is fixedly connected to a grinding cylinder (5). The middle of one end of the crushing cylinder (4) is rotatably connected to a fifth fixed shaft (26). One end of the fifth fixed shaft (26) is fixedly connected to two sets of pulleys (9). The end of the fifth fixed shaft (26) away from the pulleys (9) is fixedly connected to a crushing filter cylinder (20). The middle of the crushing filter cylinder (20) is rotatably connected to a third fixed shaft (15). The middle of the third fixed shaft (15) is fixedly connected to a crushing blade cylinder (24). One end of the third fixed shaft (15) passes through the crushing filter cylinder (20) and the crushing cylinder (4) and is fixedly connected to two sets of pulleys (9). The third fixed shaft (15) is rotatably connected to the middle of the crushing cylinder (4) and the crushing filter cylinder (20). The surface of the crushing filter cylinder (20) is provided with through holes. The upper and lower ends of the crushing filter cylinder (20) are attached to the inner surface of the crushing cylinder (4). The lower end of the pulverizing cylinder (4) is fixedly connected to a second transition pipe (13), and a filter plate is provided at the connection between the pulverizing cylinder (4) and the second transition pipe (13). The diameter of the through hole of the filter plate is the same as the diameter of the through holes on both sides of the pulverizing filter cylinder (20). The lower end of the second transition pipe (13) is fixedly connected to a grinding cylinder (5), and the pulverizing cylinder (4), the grinding cylinder (5), and the second transition pipe (13) are internally connected. One end of the grinding cylinder (5) is rotatably connected to a sixth fixed shaft (27), and a pulley (9) is fixedly connected to the middle of the sixth fixed shaft (27). The end of the sixth fixed shaft (27) away from the pulley (9) is fixedly connected to a pulverizing and grinding cylinder (21). The pulverizing and grinding cylinder (21) is rotatably connected inside the grinding cylinder (5). Both sides of the grinding and polishing cylinder (21) are fixedly connected with filter baffles (28). Both ends of the filter baffles (28) and the grinding and polishing cylinder (21) are tightly attached to the inner surface of the grinding cylinder (5). The middle of the two sets of filter baffles (28) is provided with through holes. Both sides of the grinding and polishing cylinder (21) are provided with through holes. The diameter of the through holes on both sides of the filter baffles (28) and the grinding and polishing cylinder (21) is the same. The diameter of the through holes is smaller than the diameter of the through holes on both sides of the grinding and filter cylinder (20). Both ends of the grinding and polishing cylinder (21) are provided with through holes. The diameter of the through holes is equal to the diameter of the through holes on both sides of the grinding and filter cylinder (20). The lower end of the grinding cylinder (5) is provided with a filter plate. The diameter of the through hole of the filter plate is the same as the diameter of the through hole on the side of the grinding and polishing cylinder (21).

2. The material preparation device for PVC wood-plastic composite board according to claim 1, characterized in that: The end of the grinding cylinder (21) away from the sixth fixed shaft (27) is rotatably connected to a sealing turntable (23). The middle of the sealing turntable (23) is rotatably connected to two sets of fourth fixed shafts (16). One end of the two sets of fourth fixed shafts (16) passes through the sealing turntable (23) and is rotatably connected inside the grinding cylinder (21). One end of each set of fourth fixed shafts (16) is fixedly connected to a grinding roller (25). The end of the fourth fixed shaft (16) away from the grinding roller (25) is rotatably connected to one end of the grinding cylinder (5), and the end of the fourth fixed shaft (16) away from the grinding roller (25) passes through the grinding cylinder (5). The end of each set of fourth fixed shafts (16) passing through the grinding cylinder (5) is fixedly connected to a fourth gear (19), and the two sets of fourth gears (19) mesh with each other. One set of fourth fixed shafts (16) passing through the grinding cylinder (5) is fixedly connected to a pulley (9).

3. The material preparation device for PVC wood-plastic composite board according to claim 1, characterized in that: The upper end of the crushing cylinder (4) is fixedly connected to a first transition pipe (6), the upper end of the first transition pipe (6) is fixedly connected to a cutting box (2), the upper end of the cutting box (2) is fixedly connected to a limit channel (3), the upper sides of the cutting box (2) are rotatably connected to a first fixed shaft (10), both ends of the two sets of first fixed shafts (10) pass through the cutting box (2), the middle of the two sets of first fixed shafts (10) is fixedly connected to a first cutter roller (17), one end of the two sets of first fixed shafts (10) is fixedly connected to a first gear (12), and the two sets of first gears (12) mesh with each other, and the other end of the two sets of first fixed shafts (10) is fixedly connected to a pulley (9).

4. The PVC wood-plastic composite board material preparation device according to claim 3, characterized in that: The cutting box (2) is rotatably connected to two sides of the lower end of the cutting box (2). Both ends of the two sets of the second fixed shafts (11) pass through the cutting box (2). The middle of the two sets of the second fixed shafts (11) is fixedly connected to the second cutter roller (18). One end of the two sets of the second fixed shafts (11) is fixedly connected to the second gear (14), and the two sets of the second gears (14) mesh with each other. The other end of the two sets of the second fixed shafts (11) is fixedly connected to the pulley (9), and the other end of one set of the second fixed shafts (11) is fixedly connected to two sets of pulleys (9). The two sets of the first fixed shafts (10) are connected to the second fixed shaft (11) directly below through the pulley (9) and belt. One set of the first fixed shafts (10) is connected to the third fixed shaft (15) through the pulley (9) and belt. The third fixed shaft (15) is connected to a set of the fourth fixed shaft (16) through the pulley (9) and belt.

5. The material preparation device for PVC wood-plastic composite board according to claim 4, characterized in that: The cutting box (2), crushing cylinder (4) and grinding cylinder (5) are all fixedly connected to a fixed frame (1). A fixed seat (7) is fixedly connected to one side of the fixed frame (1). A motor (8) is fixedly connected to the middle of one end of the fixed seat (7). The output end of the motor (8) is fixedly connected to one end of the sixth fixed shaft (27).

6. The material preparation apparatus for PVC wood-plastic composite board according to claim 2, characterized in that: The crushing and filtering cylinder (20) is connected to the cutting box (2) through its upper and lower ends, and the crushing and grinding cylinder (21) is connected to the second transition pipe (13) through its upper and lower ends.

7. The material preparation apparatus for PVC wood-plastic composite board according to claim 6, characterized in that: Limiting blocks (22) are fixedly connected to both ends of the crushing and filtering cylinder (20) and the crushing and grinding cylinder (21). The limiting blocks (22) are slidably connected inside the crushing cylinder (4) and the grinding cylinder (5), respectively.

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